I typically only buy APs from Acoustic Sounds anymore. And no preorders have free shipping at AS. So I rarely do preorders there unless it's something I think will sell out immediately or I want to backorder something like some of those Prestige AP titles.
The TPs and BN Classics have really wide distribution and can always be found at sale prices or through PBC as you said. I don't think I have ever paid more than $25 for a tone poet. I am seeing that it's $88 for those two titles + shipping + tax for me from AS. Definitely on the steep side for 2 albums but sadly $40 seems to be the new norm for 1LP audiophile releases. As soon as one company starts charging that successfully, the others quickly start joining along.
@zdkaiser -- i don't think i have ever been charged for shipping twice from AS if I order 2 preorders or backordered items. But I'll try to keep my eye out next time and see what happens...I have a bunch of the prestige titles backordered. I probably should have waited to order when they go back in stock...but there were a handful I absolutely didn't want to miss (like the Lightnin Hopkins titles).